# MAL-2026-17432: Malicious code in brioche-apl-dev-env (npm)


- **Type:** Malicious package
- **Package:** `brioche-apl-dev-env` (npm)
- **Published:** 30 Sep 2026

## What is MAL-2026-17432?

MAL-2026-17432 is a malicious package in brioche-apl-dev-env, published on 30 Sep 2026. 

### Official description

brioche-apl-dev-env is a dependency-confusion package: it takes a name that looks like an internal project, uses an inflated version (100.0.0) so it outranks private-registry versions, and runs `node setup.js || true` as a preinstall script on npm install. setup.js sends the hostname, username, working directory, OS, architecture, Node.js version and configured npm registry, with a per-package tracking token, in an HTTPS POST to `https://s85r5k14qk.execute-api.us-east-1.amazonaws.com/prod/hook`. The npm account amel10 published brioche-apl-dev-env and 9 similar packages within two minutes on 2026-09-30, all with the same setup.js.

The package declares a `preinstall` script that runs `setup.js` during `npm install`. That script collects installer host identifiers (hostname, OS username, current working directory, platform/arch, Node.js version, configured npm registry) together with a static per-package token, serializes them as JSON, and POSTs them to a hardcoded endpoint at https://s85r5k14qk.execute-api.us-east-1.amazonaws.com/prod/hook. The package is presented as a small utility (vowel-counting) but its only install-time effect is this outbound beacon to an author-controlled AWS API Gateway URL. The version number (100.0.0) and package naming are consistent with a dependency-confusion lure targeting an internal `brioche-apl-*` namespace, and the transmitted fields (internal hostname, username, cwd, configured registry) are exactly the reconnaissance data used to identify successfully hijacked internal builds.

## What should I do about MAL-2026-17432?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-17432 is a malicious package: brioche-apl-dev-env (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-17432/ (Markdown: https://insights.sbomify.com/MAL-2026-17432/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17432

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-17432/
Summaries are generated and may contain mistakes; the official description above is the record.